Home>Oil casing pipe>Microstructure and Mechanical Properties of X70 Pipeline

Microstructure and Mechanical Properties of X70 Pipeline

Microstructure and Mechanical Properties of X70 Pipeline Microstructure and Mechanical Properties of X70 Pipeline

The microstructure of X70 pipeline steel was studied by the analysis of OM, SEM and TEM. The precipitation behavior was discussed. The comprehensive mechanical properties, HIC and SCC performance were systematically studied. The results indicated that the microstructure of the experimental steel was mainly acicular ferrite and granular bainite. What are the API 5L X70 steel pipe specifications?What are the API 5L X70 steel pipe specifications?API 5L X70 steel pipe has a minimum yield strength of 70,300 psi or 485 Mpa. The current X70 steel pipe are all controlled micro-alloyed carbon-manganese steels. The micro-alloys elements are mainly Nb, V and Ti, and the total content of micro-alloys does not exceed 0.15%.API 5L X70 Pipe Specifications - Octalsteel What kind of steel is in X70 pipe?What kind of steel is in X70 pipe?The current X70 steel pipe are all controlled micro-alloyed carbon-manganese steels. The micro-alloys elements are mainly Nb, V and Ti, and the total content of micro-alloys does not exceed 0.15%. Therefore, the structure of the pipe is composed of acicular ferrite and bainite, and it generally has good welding performances. a. High strength b.API 5L X70 Pipe Specifications - Octalsteel

Why is X65 used in steel pipelines?Why is X65 used in steel pipelines?For low-alloy steel pipelines operating in sour service, X65 is currently the established material. Special treatment in the steelmaking shop and fulfillment of special requirements for chemical composition help prevent the formation of nucleation sites for hydrogen-induced cracking (HIC).Grade X70 - an overview ScienceDirect TopicsAn Investigation on Microstructural Evolution of X70 Steel Microstructure and Mechanical Properties of X70 Pipeline

Evaluation of the steel microstructure and mechanical properties as the result of various pipe chemistries during pipe bending has been verified in this experimental work. It is emphasized that knowledge and control of prior steel pipe chemistry, control of temperature, cooling rate and bending speed assures the reliability and repeatability of Microstructure and Mechanical Properties of X70 Pipeline Applying of Heat Treatments to Improve the Properties of Microstructure and Mechanical Properties of X70 Pipeline This work, presents some heat treatments were used to improve the microstructure in different zones of the API X70 welded pipeline steel. In this study a shielded metal arc welding (SMAW) process has been realized.. Scanning electron microscopy and X-ray diffraction have been used as characterization techniques to observe the WM microstructures, in addition hardness are also measured.

Cited by 1Publish Year 2012Author Zhan Zhan Zhang, Xiu Rong Zuo, Yue Yue Hu, Ru Tao Li, Zhi Ming ZhangMicrostructure and Mechanical Properties Analysis of X70 Microstructure and Mechanical Properties of X70 Pipeline

Abstract. Abstract. Microstructure and mechanical properties of X70 pipeline steel with polygonal ferrite plus granular bainite were characterized using tensile tests, Charpy V-notch impact tests, drop weight tear tests, hardness tests and scanning electron microscopy.Cited by 1Publish Year 2015Author Jing Li, Xiu Hua Gao, Yong Lu, Lin Xiu DuMicrostructure and Mechanical Properties Analysis of X70 Microstructure and Mechanical Properties of X70 Pipeline The results of experiment indicated that X70 pipeline steel with polygonal ferrite plus granular bainite showed an excellent combination of high strength and toughness. The base metal with polygonal ferrite plus granular bainite microstructure exhibited perfect mechanical properties in terms of the transverse yield ratio of 0.81, elongation of 46%, an impact energy of 335 J at -10 °C and a shear area of 90% at Cited by 1Publish Year 2019Author T. M. Ike, O. Adedipe, S. A. Lawal, M. S. Abolarin, O. A. OlugbojiMicrostructural analysis and mechanical behavior of the Microstructure and Mechanical Properties of X70 Pipeline The objective of this paper is to study the influence of centerline segregation degree on the microstructure and mechanical properties of X70 pipeline steels. In this study, the mechanical properties of strips produced from the slabs are examined and the results show that centerline segregation is some adverse effect on Charpy impact toughness and tensile properties of hotrolled

Continuous cooling transformation diagram and mechanical Microstructure and Mechanical Properties of X70 Pipeline

Apr 28, 2021In the present work, continuous cooling transformation (CCT) of coarse-grained heat-affected zone (CGHAZ) and simulation of Charpy-sized impact specimens were performed using a Gleeble 3800 thermomechanical simulator. Results obtained from the dilation studies show significant effect of cooling rates on microstructure and low-temperature (20 °C) Charpy impact toughness.Correlation of microstructure and charpy impact properties Microstructure and Mechanical Properties of X70 Pipeline Materials Science and Engineering A 458 (2007) 281289 Correlation of microstructure and charpy impact properties in API X70 and X80 line-pipe steels Sang Yong Shin a , Byoungchul Hwang b , Sunghak Lee a, , Nack J. Kim a , Seong Soo Ahn c a Center for Advanced Aerospace Materials, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea b Eco-Materials Correlation of microstructure and fracture properties of Microstructure and Mechanical Properties of X70 Pipeline Correlation of Microstructure and Fracture Properties of API X70 Pipeline Steels BYOUNGCHUL HWANG, YOUNG MIN KIM, SUNGHAK LEE, NACK J. KIM, and SEONG SOO AHN Effects of microstructure on fracture toughness and transition temperature of high-toughness X70 pipeline steels were investigated in this study.

Correlation of microstructure and fracture properties of Microstructure and Mechanical Properties of X70 Pipeline

Effects of microstructure on fracture toughness and transition temperature of high-toughness X70 pipeline steels were investigated in this study. Three types of steels were fabricated by varying alloying elements such as C, Cu, and Mo, and their microstructures were varied by rolling conditions such as finish rolling temperature and finish cooling temperature.Effect of Cold-Wire Addition in the TSAW Process on Microstructure and Mechanical Properties of X70 Pipeline Mohammadijoo, M, Kenny, S, Collins, L, Henein, H, & Ivey, DG. "Effect of Cold-Wire Addition in the TSAW Process on Microstructure and Mechanical Properties of the HAZ of X70 Microalloyed Pipeline Steel." Proceedings of the 2016 11th International Pipeline Conference. Volume 3 Operations, Monitoring and Maintenance; Materials and Joining Microstructure and Mechanical Properties of X70 Pipeline Effect of Microstructure on the Mechanical Properties and Microstructure and Mechanical Properties of X70 Pipeline This study investigated the influence of microstructure on the mechanical properties and fracture toughness of API X65 pipeline steel in the presence of hydrogen. In this study, electrochemical method was used for hydrogen charging and indentation technique was applied to obtain the fracture toughness. The results showed that in the presence of hydrogen, elongation (EL%), reduction of area (RA Microstructure and Mechanical Properties of X70 Pipeline

Effect of Rolling in the Recrystallization Temperature Microstructure and Mechanical Properties of X70 Pipeline

in the microstructure consisting of hard martensiteaustenite constituents (M/A islands) dispersed in a soft ductile ferrite matrix after water quenching followed by tempering at a constant temperature of 700 C. 3.2. Mechanical Properties API X70 pipeline steel for the designed purpose is required to meet the API 5L supplementary requirements.Effect of filler metal on solidification, microstructure Microstructure and Mechanical Properties of X70 Pipeline Jan 28, 2021Lower width unmixed zone is formed on the API X-70 side in 2594 filler as compared to 309L. The tensile and impact strength of 309L filler weld is superior to 2594 filler. Precipitation of reformed austenite in the weld zone leads to lower hardness in 2594 as compared to skeletal ferrite dominated 309L weld zone.Effect of welding thermal cycles on the heat affected zone Microstructure and Mechanical Properties of X70 Pipeline Microstructure and toughness of coarse grain heat-affected zone of domestic X70 pipeline steel during in-service welding", (2000). Microstructure of martensite-austenite constituents in heat affected zones of high strength low alloy steel welds in relation to toughness properties",

INVESTIGATION OF THE MECHANICAL AND

Jun 01, 2019Arid Zone Journal of Engineering, Technology and Environment (2019-06-01) . INVESTIGATION OF THE MECHANICAL AND MICROSTRUCTURAL PROPERTIES OF WELDED API X70 PIPELINE STEELInfluence of crystallographic texture in X70 pipeline Microstructure and Mechanical Properties of X70 Pipeline The effects of microstructure and crystallographic texture in four commercially-produced API X70 pipeline steels and their relation to planar anisotropy of toughness and delamination were evaluated. The experimental steels were processed through either a hot strip mill, a Steckel mill, or a compact strip mill.Low-Cycle Fatigue Properties of the X70 High-Frequency Microstructure and Mechanical Properties of X70 Pipeline Jul 24, 20183.1. Microstructure and Mechanical Properties of the X70 HFW Pipe. The microstructure of the X70 pipeline steel is a typical acicular ferrite obtained by advanced thermal-mechanical control process (Figure 2(a)). Thus, high strength and toughness were obtained (Table 2). The yield and tensile strengths of the pipe body (i.e., steel plate) were Microstructure and Mechanical Properties of X70 Pipeline

MICROSTRUCTURE AND MECHANICAL PROPERTIES OF

The main objectives of this researchthesis are to analyze the microstructure and mechanical properties of submerge arc weld and establish the role of microstructure in initiation and propagation of cracks in sour (HIC) environment. Microstructure and Mechanical Properties of X70 Pipeline (TEM) were used to investigate the microstructure of the X70 pipeline steel base metal, the weld bead and heat Microstructure and Mechanical Properties of X70 Pipeline MICROSTRUCTURE AND MECHANICAL PROPERTIES OF The main objectives of this thesis are to research analyze the microstructure and mechanical properties of submerge arcweld and establish the role of microstructure in initiation and Microstructure and Mechanical Properties of X70 Pipeline and Transmission electron microscope (TEM) were used to investigate the microstructure of the X70 pipeline steel base metal, the weld bead and heat affected Microstructure and Mechanical Properties of X70 Pipeline Mechanical Response and Performance Relationship of X70 Microstructure and Mechanical Properties of X70 Pipeline With the development of the natural gas industry, high flux natural gas pipelines will cause local deformation because of pressurization, which has an important effect in the service safety of pipeline materials. In this paper, the X70 pipeline steel with weld zone was studied, and the tensile test was used to simulate the uniaxial tensile stress. The results showed that the strain was mainly concentrated in

Microstructure and Mechanical Properties of Fiber Laser Microstructure and Mechanical Properties of X70 Pipeline

Dec 05, 2012Microstructure and Mechanical Properties of Fiber Laser-Metal Active Gas Hybrid Weld of X80 Pipeline Steel Lei Zhenglong, Lei Zhenglong 1. e-mail [email protected] Microstructure and Mechanical Properties of X70 Pipeline Correlation of Microstructure and Charpy Impact Properties in API X70 and X80 Line-Pipe Steels,Microstructure and Mechanical Properties of Girth Weld HAZ Microstructure and Mechanical Properties of X70 Pipeline Nov 10, 2016Liu, Y, Li, Y, Li, S, You, Z, & Yin, Z. "Microstructure and Mechanical Properties of Girth Weld HAZ in X80 Line Pipe With High Deformability for Strain Based Design Applications." Proceedings of the 2016 11th International Pipeline Conference. Volume 3 Operations, Monitoring and Maintenance; Materials and Joining. Calgary, Alberta, Canada.Microstructure, mechanical properties and hydrogen induced Microstructure and Mechanical Properties of X70 Pipeline According to the severity of centerline segregation of the slab, it affects the mechanical properties and final microstructure of rolled strip. The objective of this paper is to study the influence of centerline segregation degree on the microstructure and mechanical properties of X70 pipeline

Microstructure, texture evolution and mechanical Microstructure and Mechanical Properties of X70 Pipeline

Aug 04, 2017The finish rolling temperature play a key role in the development of the microstructure and influenced mechanical properties of API ×70 steel. It was found that after accelerated cooling, the fast cooling rate and low temperature interruption allows the formation of more bainite which in turn increased the tensile strength of the steel.Microstructure, texture evolution and mechanical Microstructure and Mechanical Properties of X70 Pipeline The evolution of microstructure, texture and mechanical properties of API X70 pipeline steel after different thermomechanical treatments has been studied using a combination of X-ray diffraction and electron backscatter diffraction (EBSD).MicrostructureandmechanicalpropertiesofX70pipelinesteel with polygonal ferrite plus granular bainite were characterized using tensile tests, Charpy V-notch impact tests, drop weight tear tests, hardness tests and scanning electron microscopy.Author: Zhan Zhan Zhang, Xiu Rong Zuo, Yue Yue Hu, Ru Tao Li, Zhi Ming ZhangCited by: 1Publish Year: 2012Microstructure and Mechanical Properties Analysis of X70 Microstructure and Mechanical Properties of X70 Pipeline Was this helpful?People also askWhat are the properties of grade X70 pipeline?What are the properties of grade X70 pipeline?Properties of 682.4-mm OD × 15.9 mm WT, API Grade X70 linepipe. A large offshore project in grade X70 is the pipeline in the North Sea operated by Statoil, connecting Karstø, Norway, with Dornum, Germany. This pipeline has a length of 600 km and it is built of pipe 42 in. × 2530 mm WT.Grade X70 - an overview ScienceDirect Topics

Post-Weld Heat Treatment of API 5L X70 High Strength Low Microstructure and Mechanical Properties of X70 Pipeline

High Strength Low Alloy (HSLA) steels are the materials of choice in pipeline construction with the API X70 grade as the steel for the majority of pipeline networks constructed during the late 20th and early this century. This paper reports on the influence of Post-Weld Heat Treatment (PWHT) on the reduction of residual stresses, resulting changes in the microstructure, and mechanical Microstructure and Mechanical Properties of X70 Pipeline Prediction of microstructure and mechanical properties of Microstructure and Mechanical Properties of X70 Pipeline Translate this pageThe aim of this work is to study the effects of preheating and type of electrodes on microstructure and mechanical behaviors of X70 pipeline steel welded joint. The results indicated an accordance among the hardness measurements, the microstructure and the tensile strength.Some results are removed in response to a notice of local law requirement. For more information, please see here.

Study on continuous cooling transformation and strength Microstructure and Mechanical Properties of X70 Pipeline

Jan 01, 2014Microstructure evolution and mechanical properties of X70 pipeline steel with high deformability was studied in this paper, phase transformation of this steel was investigated by continuous cooling transformation (CCT) method on FormastorFII automatic transformation instrument. It was concluded that the phase transformation of the steel mainly occurred at 800500ºC with Ac1 = 730ºC Through-Thickness Inhomogeneity of Texture, The development of inhomogeneity in the microstructure, texture, and mechanical property in hot-rolled (API) 5L X70 pipeline steel after rough and finish thermomechanical control processing has been investigated by experimental measurements. Our investigations revealed that the rough rolling stage produced mostly large and coarse ferrite grains across the thickness, while the finish rolling Microstructure and Mechanical Properties of X70 Pipeline

Main Steel Grades

The main products are carbon steel, wear plate, alloy steel, shipbuilding steel, hot/cold rolled steel, boiler steel, mild steel, seamless steel pipe, according to Americal standard ASTM, Japanese standard JIS, German standard DIN, EN, etc.

OUR FACTORY

Our mill has three steel plates production lines and Machining Platform

STEEL PLATE PRODUCTION LINE

STEEL PLATE PRODUCTION LINE

STEEL PIPE PRODUCTION LINE

STEEL PIPE PRODUCTION LINE

STEEL COIL PRODUCTION LINE

STEEL COIL PRODUCTION LINE

STEEL MACHINING CENTER

STEEL MACHINING CENTER

Contact Us

We are gradually formed four major advantageous products: steel plate, steel pipe, stainless steel, special steel, and established our own Machining processing center in order to meet customer's diverse requirements.

Welcome to contact us through online consulting, emails and hotline if you are interested in our company or products. Our staff will reply you within 24 hours.

  • E-mail: [email protected]
  • Tel: 0086-13569929107
  • Address: 50 Guohuai Road, Henan Province, China

Leave a Message